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Finding the Fourth Proportional to 18,381.60, 27,543.60 and 15,904.80

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Solution

The fourth proportional to 18,381.60, 27,543.60 and 15,904.80 is: 23,832.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.60 : 27,543.60 = 15,904.80 : x
  2. Step 2: Convert to fraction form
    18,381.60/27,543.60 = 15,904.80/x
  3. Step 3: Cross multiply
    18,381.60x = 27,543.60 × 15,904.80
  4. Step 4: Simplify right side
    18,381.60x = 438,075,449.28
  5. Step 5: Solve for x
    x = 438,075,449.28/18,381.60
  6. Step 6: Final answer
    x = 23,832.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.